Moisture analyzers on earth can use gravimetric methods like loss on drying to measure the moisture content in a sample. However, what do you do when you need to measure atmospheric moisture content and that too on a different planet? This paper examines the working of the moisture meter used in the spacecraft Vega 1 and 2 sent to Venus. This is another fascinating insight into space technology. Consider that the spaceships have to travel through space before plunging into the Venusian atmosphere. Sensors and other instruments are built to withstand the harsh extremes of temperatures in space. That in itself is a feat of engineering par none.
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